ARM: davinci_all_defconfig: enable GPIO_SYSFS

CONFIG_GPIO_SYSFS provides a convenient way to
access GPIOs from userspace.

Enable it for DaVinci.
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/configs/davinci_all_defconfig

@@ -118,6 +118,7 @@ CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_DAVINCI=y
 CONFIG_PINCTRL_SINGLE=y
+CONFIG_GPIO_SYSFS=y
 CONFIG_GPIO_PCF857X=y
 CONFIG_WATCHDOG=y
 CONFIG_DAVINCI_WATCHDOG=m